Type and machinery limited



Dec.,22., 1925. 5 1'. R. G. PARKER TRIMMING MECHANISM FORCURVEDSTEREOTYPE PLATE CASTING MACHINES Filed Jan. 26. 1924 PatentedDec. 22, 1925.

UNITED STATES N 1,566,551 PATENT orFIcE;

THOMAS ROBERT GILLETTPAEKEROE AETRINOHAM, ENGLAND, AssIGNOR TO"'I.II\TOlj TYPE AND MACHINERY LIMITED, OE LONDON, ENGLAND, A COMPANY EEeIs- ITERED UNDER THE LIMITED LIABILITY ooMPANYs'AoTs (1862 To 1900) OE THEBRITISH IMPERIAL PARLIAMENT TRIMMING MEOHANISM nonOUIWED-sTEEEOTYPE-PLATEoAsTING, MACHINES,

Application mea' January 26, 1924. serial No. 688,640, j

To all /wLOm Zt may concern."

Be it ki'iown that I, THOMAS ROEnRTGI'Lf PARKER, a British subject, andresident i of Altrincham, in the county of Chester, England, lhaveinvented new and useful Improvements in j or Relating to Trimming`lt/Iecha'nism for Curved-Stereotype-Plate- Ca'sting Machines, of whichthe following is 'a specification.`

This invention relates to trimming mechanism for curved stereo-typeplate n casting machines and more particularlyfto thesaw employed insuch mechanism for severing Y from the plate the sullage-piece or headproduced thereon by the casting Operation. yThe invention has foritsobject to'providemeans for adjusting the saw for different sizes ofplates, more conveniently and'expeditiously than has heretofore beenpossible with the means hitherto available for the purpose.

Heret'ofore adjustments of the character contemplated by the presentinvention, vhave involved the substitution or interchangevof distanceieces of differentlengths, by which ,they revo ving saw is held in itsdifferent positions according to the width of the plates to be produced.Such a substitution or interchange of these distance pieces necessarilyabsorbs a considerable amount of time not Only in that operation itself,but by reason of the diflioulty of obtaining access to the saw jAccording to the present invention, the foregoing difliculties areOvercome b-y pro- 5 viding a construction whereby the saw can headjusted by a screw rotatable from the outside of the casing in whichthe saw is located, and the saw can be retained in its dilferentoperative positions by a register lio lcasing, and whereby, still fromthe outside, the position of the saw can be determined 4and readilyascertained.

` In the accompanying drawings which represent one construotional formof the improved mechanism Figure 1 is an elevation of suficient of thetrimming mechanism to illustrate the emf bodilnent therein of thepresent improves ments, and

Figure 2 is plan of' same. In the construction as here illustrated, the

pin nsertable also from the outside of saidk arms of a fork Ory-oke 2,with a capacity for rotarymovement relatively to said arms, but nototherwise movableindependently 'thereof, said saw, as ordinarily, beingsplined ,to its shaft- 3 so kthat it can he shifted along that shaftwithout disturbing its rotative 5 fixed to, or formed integral with, thesaw j casing.` The movementof the yoke 2 along the guide 5 is impartedto it by a` vertical screw shaft' journalled in the saw casing 4, and in4threaded engagement lwith' the yoke, and the upper end of this screwshaft j projects'through the saw casing and,l at that part, is of squareform asin the drawings, or of other shape suitable forireoeiving, andthe engagement therewith of, a crank handle to enable the said shaft tobe conveniently rotatedfor effect-ing the vertical adjustment f of thesaw l along its shaft 3. j o The yoke 2 has attachedl to it' a pointer 7which projects through 'a vertical slot 8 in the saw casing 4, and thispointer, conjointly with ,a suitably marked.scale 9onthe outside of thesaw casing, serves to indicate when the saw is in proper position forcutting Or trimming the stereotype plates to the desired width.

The locking of the yoke 2 in its different definite positionscorresponding to those indicated on the scale 9, may be effected invariousways, but it is preferred to attain that/result by the followingmeans. On theV upper end of the screw shaft 6, and closely adjacent tothe cover 10 of the saw casing 4, there is rigidly seoured'a disc llhaving perforations l2 located in different angular positions to accordwith the respectively dif-y ferent positions indicatedon the scale 9,each such perforation being adapted to receive a registering pin 13 whenthat perforation is brought into co-aXial register with a hole 14(Figure l) in the cover 10. Each of they perforations'12 may be markedcorrespond ingly with the markings of the scale 9` so asserted into thehole 14 for locking the saw saw l @Weie .between the two tires .or lin apesiton .appropriate to a given Width of plate,V the screw shaft 6 shallhave been rotated the desired number of times and to the required extentto bring the sarir into that particular position. For example, assumingthat the saw is to be set for trimming a pla-te of say seven columnswide, the

screw shaft 6 is rotated until the pointer 7 registers with the 7-columnindication on the scale 9 and the 7-colu1nn perforation l2 of the discll cro-axially registers with the hole 14 at which juncture the pin 13'may be inserted to lock the saw l in the position thus precisely arrivedat. y

If desired, the scale 9 and disc ll may be marked with indications ofthe numbers o f columnsor with thev titles of different newspapers orjournals `the plates for which are of respectively different widths. .jj

Having describedmy invention, I declare thatr I claim and des-ire tosecureY by Letters Patentl isy- Y l j j K l. In plate-trimming'.mechanism of stereotype -plate casting machines, the c`ombination' witha saw casing a saw shaft revoluble within said casing and a circular sawaxially adjustable along'` that shaft for trimming` vplates of differentwidths, of a yoke movable in a direction parallel to the axis ofthe sawshaftk and between the arms o-f which the saw ismounted, a screw shaftjournalled in and rotatable from the exterior yof the casing in threadedengagement withv the yoke, a scale on the outside of the casing bearingindications of different operative positions ofthe saw, and a pointerattached yto 4the yoke and projecting against said scale through a slotin the casing. y V l 2. In plate-trimming. mechanism of stereyotypeplate casting machines, the Combination with al saw casing aV saw shaftrevolublewithm said casing and a circular saw axially adjustable alongthat shaft for trimming plates of different widths, of a yoke movable ina direction parallel to the axis of the saw shaft and between the armsof which the saw is mounted, a screw shaft journalled in and rotatablefrom the exterior of the casing in threaded engagement with the yoke, aperforated disc secured to the screw'shaft closelyl adjacent to theexterior of the casing, and a registering pin adapted to engage a discperforation and a perforation in the Casing co-axial therewith to lockthe disc against angular 'movement 3. In plate-trimming mechanism ofstereotype plate casting machines, the combination with a saw casing asaw shaft revoluble within' said Casing and a cir-cular sawv axiallyadjustable along that shaft for trimming :plates of diiferent widths, ofa yoke movable in a directionr parallel to the axis of the saw shaft andbetween the arms of which'the saw is mounted, a screw shaft journalledin and rotatable from` the exterior ofthe casing in threaded engagementwith the yoke, a scale on the outside of the casing bearing indicationsof differentoper-` ative positions of the saw, a pointer attached4 tothe yoke and projecting against said scale through a slot in the"casing, a disc securedr to the screw shaft closely adjacent to theexterior of the casing having perforations apporpriate tofrespect'iveoperative positions of the saw and bearing indications similar t'o thoseon the scale, and a registering pin adapted to engage a discperfo-ration and a perforation in the casing co-axial therewith to lockthe disc against angular movement.

In testimony whereof I have afiixed my signature hereto. j, i

THOMAS ROBERT GILLETT PARKER.

